US 12,082,479 B2
Display device and method of manufacturing the same
Heesung Yang, Seoul (KR); Seung Bae Kang, Suwon-si (KR); Bonggu Kang, Seoul (KR); Tae Wook Kang, Seongnam-si (KR); Joon-Hwa Bae, Suwon-si (KR); Woojin Cho, Yongin-si (KR); and Byoung Kwon Choo, Hwaseong-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by Samsung Display Co., LTD., Yongin-si (KR)
Filed on May 19, 2021, as Appl. No. 17/324,626.
Application 17/324,626 is a continuation of application No. 16/581,993, filed on Sep. 25, 2019, granted, now 11,050,045.
Claims priority of application No. 10-2018-0126447 (KR), filed on Oct. 23, 2018.
Prior Publication US 2021/0273208 A1, Sep. 2, 2021
Int. Cl. H10K 71/00 (2023.01); H01L 21/3105 (2006.01); H01L 21/311 (2006.01)
CPC H10K 71/00 (2023.02) [H01L 21/31051 (2013.01); H01L 21/31127 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A display device comprising:
a planarization layer covering transistors in a display area on a substrate;
an organic light emitting diode on the planarization layer;
a pad electrode in a non-display area on the substrate, the non-display area surrounding the display area; and
a capping layer capping a side surface of the pad electrode, the capping layer including a material different from that of the planarization layer, wherein
the pad electrode includes a first laver on the substrate, a second layer on the first layer, and a third layer on the second layer,
the capping layer does not extend directly under the planarization layer,
the capping layer does not overlap a top surface of the pad electrode,
the capping layer covers side surfaces of the first and second layers of the pad electrode, and does not cover at least a part of a side surface of the third layer of the pad electrode,
the capping layer has a flat top surface lower than the top surface of the pad electrode, and
the capping layer is a remnant of a different layer than that of the planarization layer.